, they will always find one. >> beyond a reasonable doubt is like swiss cheese. there's holes everywhere. there's big p pces missing. there's gaps. >> reporter: jennifer ford, injure numb juror number 3 in the trial, told us all the evidence prosecutors said point to guilt could have pointed another way, too. >> every expert, like, with anything, i could have been what the prosecution said, it could be the defense. if it's both, it could not be proven. >> there's a disconnect. because people outside see the trial on television. they think of it as reality telelesion. and on television, there's always a result. if this person isn't guilty, someone else is. in real life, we may never know what happened. we may end up with uncertainty. uncertainty is a very important part of the criminal justice system. >> most cases are circumstantial evidence. that's so not unusual. and nevertheless, juries, most of the time, find their way to a conviction when the circumstantial evidence adds up. in my opinion, this did. >> reporter: but for casey anthony, all that is just a moomoot argument now. what happens to her?